Comparison of Embodied Energy/CO2 of Office Buildings in China and Japan

Yokoo, Noriyoshi; Oka, Teruaki; Yokoyama, Keizo; Sawachi, Takao; Yamamoto, Makoto

doi:10.17265/1934-7359/2015.03.008

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the medium value constitutes of 59% recycled steel (normal for the production of rods in Europe; in the rest of the world the percentage may vary between 35.5 and 39%) and the rest of virgin steel [3] with proportional energy consumption of 17.40MJ/kg, and the pollution created by CO2 of 1,40 kgCO2/kg. Resuming the chosen construction materials, the following values for the quantification of embodied energy and carbon dioxide emissions are used for both constructive solutions.…”

Section: Table IV Comparison Of Embodied Energy and Co2 Emissions In mentioning

confidence: 99%

“…So far, the question of, which construction material has less embodied energy and gas emission is open. [1][2] [3][4] A possible solution is the method of comparison according to the recommendations of ISO 14040, which establishes that to compare products functional units must be created. These functional units must be functional in the sense that the products to compare should perform the same function and operate under the same physical and environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

2016

9th International Conference on Latest Trends in Engineering and Technology (ICLTET'2016) Oct. 13-14, 2016 Abu Dhabi (UAE)

View full text Add to dashboard Cite

Abstract-Construction materials have distinguished energyconsumptions and different emissions of carbon dioxide from fabrication up to application. The processes and the treatments needed to transform the raw materials into the final products, the transport to the construction sites and the techniques used for their application, all contribute to the differences in embodied energy and carbon footprint of these materials. In an environmental assessment one wonders what kind of constructive solution is environmentally more favorable. This study refers to the environmental comparison of reinforced concrete and ceramic bricks. Through a digital three-dimensional building model, the required data are analyzed. The building model is once considered with a reinforced concrete structure, consisting of columns, beams and slabs, with brick walls in between the columns in the periphery and interior of the building. Then, structural masonry with ceramic blocks in the exterior and interior walls is studied. Both models are analyzed in two versions. In the first version the slabs are of reinforced concrete and in the second version the slabs are built in pre stressed concrete beams and ceramic blocks. The building model represents for all solutions equal conditions. The comparison is limited to the quantification of the most important environmental parameters, the embodied energy and CO2 emissions. The results of this study show that the Masonry Model Version 1 has a 11% reduction in CO2 and 12% reduction in energy consumption, while Version 2 has a 39% reduction in CO2 and 41% reduction in energy consumption compared to the construction with reinforced concrete structure. These differences are due to the reduction of reinforced concrete in structural masonry, which is more significant for Version 2.

show abstract

Section: Table IV Comparison Of Embodied Energy and Co2 Emissions In mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

2016

9th International Conference on Latest Trends in Engineering and Technology (ICLTET'2016) Oct. 13-14, 2016 Abu Dhabi (UAE)

View full text Add to dashboard Cite

show abstract

“…In the building sector, the GHG from operational energy use is the key contributor to climate change (Ahmed et al, 2021;Francart et al, 2019;Sharma et al, 2011). Eurostat (2018) reported that the sector contributes 16% of GHG emissions within the European Union and 5%-40% in other countries (Yokoo et al, 2015). It is a long-term change in temperature forms, precipitation levels, wind forms, and other features of climate schemes (Federici et al, 2015;Morecroft et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Appraising the impact of climate change on construction activities: Are the Nigerian practitioners prepared?

Ebekozien,

Ahmed,

Aigbavboa

et al. 2024

J. Infras. Policy. Dev.

View full text Add to dashboard Cite

Rapid global warming and continuous climate change threaten the construction industry and human existence, especially in developing countries. Many developed countries are engaging their professional stakeholders on innovation and technology to mitigate climate change on humanity. Studies concerning inclusive efforts by developing countries’ stakeholders, including Nigeria, are scarce. Thus, this study investigates the construction industry’s practitioners’ preparedness to mitigate climate change through pre- and post-planning. Also, the study appraises climate change’s impact on construction activities and proffered measures to mitigate them. The research employed face-to-face data collection via a qualitative approach. The researchers engaged 33 knowledgeable participants. The study covered Abuja, Benin City, Owerri, and Lagos and achieved saturation at the 30th participant. The research employed a thematic approach to analyse the collected data. Findings reveal that Nigerian construction practitioners cannot cope with climate change impacts because of lax planning and inadequate technology to mitigate the issues. Also, the government’s attitude towards climate change has not helped matters. Also, the study suggested measures to mitigate the impact of climate change on construction activities in Nigeria. Therefore, as part of the research contributions, all-inclusive and integrated regulatory policies and programmes should be tailored toward mitigating climate change. This includes integrated stakeholder sensitisation, investment in infrastructure that supports anti-climate change, prioritising practices in the industry to achieve sustainable project transformation, and integration of climate change interventions into pre- and post-contract administration.

show abstract

Study the impact of design method preference on the usefulness of concrete and on CO₂ emissions

Abdelgader,

Kurpinska,

Abdelgader

et al. 2024

IJBPA

View full text Add to dashboard Cite

PurposeThe research investigates the impact of concrete design methods on performance, emphasizing environmental sustainability. The study compares the modified Bolomey method and Abrams’ law in designing concretes. Significant differences in cement consumption and subsequent CO2 emissions are revealed. The research advocates for a comprehensive life cycle assessment, considering factors like compressive strength, carbonation resistance, CO2 emissions, and cost. The analysis underscores the importance of evaluating concrete not solely based on strength but also environmental impact. The study concludes that a multicriteria approach, considering the entire life cycle, is essential for sustainable concrete design, addressing durability, environmental concerns, and economic factors.Design/methodology/approachThe study employed a comprehensive design and methodology approach, involving the formulation and testing of 20 mixed concretes with strengths ranging from 25 MPa to 45 MPa. Two distinct design methods, the modified Bolomey method (three equations method) and Abrams’ law, were utilized to calculate concrete compositions. Laboratory experiments were conducted to validate the computational models, and subsequent analyses focused on assessing differences in cement consumption, compressive strength, CO2 emissions, and concrete resistance to carbonation. The research adopted a multidisciplinary perspective, integrating theoretical analysis, laboratory testing, and life cycle assessment to evaluate concrete performance and sustainability.FindingsConclusion from the study includes substantial variations (56%–112%) in cement content, depending on the calculation method. Abrams' law proves optimal for compressive strength (30 MPa–45 MPa), while the three equations method yields higher actual strength (30%–51%). Abrams' law demonstrates optimal cement use, but concrete designed with the three equations method exhibits superior resistance to aggressive environments. Cement content exceeding 450 kg/m³ is undesirable. Concrete designed with Abrams' law is economically favorable (12%–30% lower costs). The three equations method results in higher CO2 emissions (38–83%), emphasizing the need for life cycle assessment.Originality/valueThis study’s originality lies in its holistic evaluation of concrete design methods, considering environmental impact, compressive strength, and cost across a comprehensive life cycle. The comparison of the traditional Abrams' law and the three equations method, along with detailed laboratory tests, contributes novel insights into optimal cement use and concrete performance. The findings underscore the importance of a multicriteria approach, emphasizing sustainability and economic viability. The research provides valuable guidance for engineers and policymakers seeking environmentally conscious and economically efficient concrete design strategies, addressing a critical gap in the field of construction materials and contributing to sustainable infrastructure development.

show abstract

Comparison of Embodied Energy/CO2 of Office Buildings in China and Japan

Cited by 3 publications

References 3 publications

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

Appraising the impact of climate change on construction activities: Are the Nigerian practitioners prepared?

Study the impact of design method preference on the usefulness of concrete and on CO₂ emissions

Contact Info

Product

Resources

About

Comparison of Embodied Energy/CO2 of Office Buildings in China and Japan

Cited by 3 publications

References 3 publications

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

Comparison of Environmental Benchmarks of Masonry and Concrete Structure Based on a Building Model

Appraising the impact of climate change on construction activities: Are the Nigerian practitioners prepared?

Study the impact of design method preference on the usefulness of concrete and on CO2 emissions

Contact Info

Product

Resources

About

Study the impact of design method preference on the usefulness of concrete and on CO₂ emissions